Hi Kelly,
Can you help me sort out the irony here? We are trying to figure a way to overwrite vector tiles while maintaining the item id. We are using Portal, but so far it seems the only option is to create a new vector tile package, but this leads to a new item id which are not recognized in existing web maps. However, ESRI has an awesome collection of vector basemaps available that are maintained regularly--how is ESRI keeping their basemaps current without creating new item id's? (Or how is this handled otherwise?) Thanks,
-Jeff